Abram hag adorn



'tlntcd gratte ABRA'M nAoADoinv, or' cANMoHARIE, NEW YORK.

Letters Patent No. 97,503, dated December 7, 1869.A

IMPROVED COAL-ASH] SIIETER.

The `Schednle referred to in these Letters 'Patent and making partrof the same."

To all whom it may concern Be it known that I, ABRAM HAGADORN, of Canajohaiie, in the county-of Montgomery, andY State of New York, have invented a new and improved Coal Ash Sifter; and I do hereby declare that the following is a fulhclear, and exact description thereof', which will Ienableothers skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.`

Figure l represents a vertical transverse section of Y my improved coal-ash sifter.

Figure 2 is a plan or top View ofthe same.

-Similar letters of reference indicate corresponding parts. V

'This invention has for its object, to so construct coal and gsh-sifters, of `that class in which a rotary screen is employed, that 'such screen can be locked stationary while coal and ashes are being filled in.

The ordinary rotary ash-sitters heretofore in use, were not provided with such device, and the screens will therefore turn while being filled,and willl dump out their contents before they are sifte-d.

A, in the drawing, represents a cylindrical or prisinatic perforated screen, hung in a funnel-shaped or other box, B, so that the axle-ends a, projecting from the ends ofthe screen, have their bearings in the ends of the box, as shown.

The box may bev provided with a lid, (l, which is closed when the sifting-process is carried on.

The screen itself is provided with a hinged door, D,

through which it can be filled and emptied.

E is a hook hung on the inside of the box, so that it can be locked into an aperture formed in the ledge of a disk or plate', b, that projects from one end of' the screen, or int-o a staple or other device attached tothe screen.

Whentbe hook is thus locked to the screen, the latter is held fast, so that it cannot turn, and the door, which will then be on the upper side, can be opened, and y the screen filled; wit-hout` an )1 danger of dumping its contents by spontanenstinning:

When the screen is filled, the door D is closed, and the hook detached from it. While the screen is being revolved by hand or otherwise, the hook may be placed upon the arbor a, as in-fig. 2, so that it willnot inte-r- 'fere with the sifting-operation.

It' it is short enough, it may be suspended in the box, out of' the wav of' the screen. y A

The same invention is applicableA to all other kinds of' rotary screens. y

Having thus described my invention, Y

What I lclaim ns inv improvement in ash-sitters,

The hook E, to hold 'the sifter firmly'whle being 

